Texas Rep. Ted Poe today said there is “a great possibility” that a white supremacist group is behind the deaths of a Texas district attorney and his wife fatally shot in their home over the weekend.

Appearing on CNN, the former Harris County prosecutor and judge said he believed a group is behind the killings of three Texans.

The bodies of Kaufman County District Attorney Mike McLelland and his wife, Cynthia, were discovered with gunshot wounds at their Forney home. McLelland had been investigating the death of his former assistant, Mark Hasse, who was killed near his courthouse office at the end of January.

The Republican from Humble said he felt the murders were an effort to intimidate those involved in a possible ongoing investigation into a criminal group.

“I don’t believe that intimidation will work. There will be someone who will step forward and continue this investigation and find the culprits who are responsible for these two homicides, three homicides now,” Poe said.

When asked if the Aryan Brotherhood, a white supremacist prison gang, could possibly be behind the killings, Poe didn’t say for certain it could be the group, but that “it is a great possibility.”

Poe said it’s tricky as a prosecutor because even though a a criminal goes to jail, their family and friends did not and could be looking at for them.

Despite the slight risk behind prosecuting criminals, Poe said to remember the United States hasn’t seen a dramatic number of prosecutors being killed. He said 13 prosecutors have been killed over the last 30 years.

“But more prosecutors are watching out for their own safety and the safety of their family, and judges as well, because people sometimes become more violent and don’t like, not only the case, but the case the prosecutor is investigation,” he said.